[Request] Music Browser

[cnapolit]

After creating https://github.com/joyrider3774/PlayniteSound/issues/25 and playing the library from vlc for a bit, I realised a built-in music browser/player might be neat. It would function similar to how a normal music playing app might function, but with the option to use Playnite game fields to filter the library. For example, a person may want to listen to any random track from their favorite games.